This posthumously published essay presents Hans De Wolf's sharp analysis of one of the greatest rivalries in art history: a rivalry between two centuries, embodied by two of their most prominent figures: Courbet for the 19th and Duchamp for the 20th Century. It is a story in which, in a certain sense, one becomes the perfect enemy of the other. This constellation helped Duchamp to forge his own path, creating an artistic response to Courbet's work with equal relevance and monumentality. The c...